package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

import javax.validation.constraints.Max;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /***
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
       dishMapper.insert(dish);

         //获取insert语句生成的主键值
        Long dishid = dish.getId();
        List<DishFlavor> flavors=dishDTO.getFlavors();
      if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishid);
            });
          //向口味表插入n条数据
               dishFlavorMapper.insertBatch(flavors);
      }

    }

    /***
     * 分页查询菜品
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
         //判断当前菜品是否能够删除----是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品处于起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除----当前的这个菜品是否跟套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
/*        for (Long id : ids) {
              dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }*/
        //根据菜品id批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //根据菜品id批量删除关联口味的数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据id修改菜品基本信息和对应的口味信息
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表的基本信息
          Dish dish=new Dish();
          BeanUtils.copyProperties(dishDTO,dish);
         dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品数据
     * @param categoryId
     * @return
     */
    public List<Dish> ListById(Long categoryId) {
        Dish dish=new Dish();
        dish.setCategoryId(categoryId);
        return dishMapper.selectlist(dish);
    }

    /**
     * 起售和停售菜品
     * @param id
     * @param status
     */
    public void startingSales(Long id, Integer status) {
        //停售菜品同时停售相关的套餐
        if(status==StatusConstant.DISABLE){
            //根据菜品id查询相关的套餐
           List<Setmeal> setmeals=setmealMapper.getSetmealByDishId(id);
           if(setmeals != null && setmeals.size()>0){
               setmeals.forEach(setmeal -> {
                   setmeal.setStatus(StatusConstant.DISABLE);
                   setmealMapper.update(setmeal);
               });
           }
        }
        Dish dish=new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }


}
